v  Have  a  small  flat-blade  screwdriver  available. 
v  You  do  not  have  to  turn  off  the  server  to  install  or  replace  hot-swap  fans, 
redundant  hot-swap  ac  power  supplies,  or  hot-plug  Universal  Serial  Bus  (USB) 
devices.  However,  you  must  turn  off  the  server  before  performing  any  steps  that 
involve  removing  or  installing  adapter  cables  or  non-hot-swap  optional  devices  or 
components.
 Attention:  In  a  dc  power  environment,  only  trained  service  personnel  other 
than  IBM  service  technicians  are  authorized  to  connect  or  disconnect  power  to 
the  dc  power  supply  and  to  install  and  remove  a  dc  power  supply.  See  the 
documentation  that  comes  with  each  dc  power  supply. 
v  Blue  on  a  component  indicates  touch  points,  where  you  can  grip  the  component 
to  remove  it  from  or  install  it  in  the  server,  open  or  close  a  latch,  and  so  on. 
v  Orange  on  a  component  or  an  orange  label  on  or  near  a  component  indicates 
that  the  component  can  be  hot-swapped,  which  means  that  if  the  server  and 
operating  system  support  hot-swap  capability,  you  can  remove  or  install  the 
component  while  the  server  is  running.  (Orange  can  also  indicate  touch  points  on 
hot-swap  components.)  See  the  instructions  for  removing  or  installing  a  specific 
hot-swap  component  for  any  additional  procedures  that  you  might  have  to 
perform  before  you  remove  or  install  the  component. 
v  When  you  are  finished  working  on  the  server,  reinstall  all  safety  shields,  guards, 
labels,  and  ground  wires. 
v  For  a  list  of  supported  optional  devices  for  the  server,  see  http://www.ibm.com/
servers/eserver/serverproven/compat/us/.
System  reliability  guidelines 
To  help  ensure  proper  cooling  and  system  reliability,  make  sure  that  the  following 
requirements  are  met: 
v  Each  of  the  drive  bays  has  a  drive  or  a  filler  panel  and  electromagnetic 
compatibility  (EMC)  shield  installed  in  it. 
v  If  the  server  has  redundant  power,  each  of  the  power-supply  bays  has  a  power 
supply  installed  in  it. 
v  There  is  adequate  space  around  the  server  to  allow  the  server  cooling  system  to 
work  properly.  Leave  approximately  50  mm  (2.0  in.)  of  open  space  around  the 
front  and  rear  of  the  server.  Do  not  place  objects  in  front  of  the  fans.  For  proper 
cooling  and  airflow,  replace  the  server  cover  before  turning  on  the  server. 
Operating  the  server  for  extended  periods  of  time  (more  than  30  minutes)  with 
the  server  cover  removed  might  damage  server  components. 
v  You  have  followed  the  cabling  instructions  that  come  with  optional  adapters. 
v  You  have  replaced  a  failed  fan  within  48  hours. 
v  You  have  replaced  a  hot-swap  drive  within  2  minutes  of  removal. 
v  You  do  not  operate  the  server  without  the  air  baffles  installed.  Operating  the 
server  without  the  air  baffles  might  cause  the  microprocessors  to  overheat. 
v  Microprocessor  socket  2  always  contains  either  a  heat-sink  filler  or  a 
microprocessor  and  heat  sink.
Working  inside  the  server  with  the  power  on 
Attention:  Static  electricity  that  is  released  to  internal  server  components  when 
the  server  is  powered-on  might  cause  the  server  to  halt,  which  could  result  in  the 
loss  of  data.  To  avoid  this  potential  problem,  always  use  an  electrostatic-discharge 
wrist  strap  or  other  grounding  system  when  working  inside  the  server  with  the 
power  on.
 
10  IBM  System  x3650  Type  7979:  Installation  Guide